Question

Select the correct statements regarding electric conduction.

• A. Involves the transfer of molecules
• B. Happens by the movement of electrons
• C. Does not involve the transfer of matter.
• D. Happens by the movement of ions

Answer 1

The correct option is D Happens by the movement of ions

Electric conduction happens by the movement of ions, hence it involves the transfer of matter (ions in this case).

Example: Electrolysis of lead bromide

$PbB{r}_2\rightleftharpoons$ $P{b}^{2+}+2B{r}^{-}$

Lead ions move towards cathode (-ve electrode) and Bromide ions move towards (+ electrode) anode leading to electric conduction.